noun
エピペン、エピネフリン自己注射器
An epinephrine/adrenaline autoinjector. A lifesaving device designed to ease the symptoms of anaphylaxis/anaphylactic shock, so as to save the life of the victim of the extreme allergic reaction, by injecting a dose of adrenaline/epinephrine through a spring-loaded needle that punches into the tissue it is triggered against.